Great Dark Spot

Although it is far too cold for blossoming flowers, summer does bring storm clouds and presumably rain to Titan's south polar region. The observed persistence of convective storm activity in the re...

Engineers at NASA's Ames Research Center, Moffett Field, Calif., prepare NASA's Lunar Atmosphere and Dust Environment Explorer (LADEE) Observatory for acoustic environmental testing.

Cassini's ability to remain precisely and steadily pointed at targets, such as Saturn's moon Mimas (seen here) yields sharp images despite the relatively high speed at which the spacecraft moves. ...

This image, taken by NASA's Dawn spacecraft, shows the surface of dwarf planet Ceres from an altitude of 915 miles (1,470 kilometers). The image was taken on August 21, 2015, and has a resolution o...

On Jan. 22, 2012, the Sun erupted with a solar flare, a coronal mass ejection, and a burst of highly energetic protons known as solar energetic particles.

Triton Voyager 2 approach sequence with latitude-longitude grid superposed. 

A large crater in the southern hemisphere of dwarf planet Ceres is seen in this image taken by NASA's Dawn spacecraft on June 6, 2015.

The Encke Gap moon, Pan, has left its mark on a scalloped ringlet of the Encke Gap. The moon creates these perturbations as it sweeps through the 325-kilometer (200-mile) gap in the A ring. Three ...

Saturn's moon Daphnis creates waves of disturbance in the Keeler Gap in this image of the wide A ring and narrow F ring. Daphnis (8 kilometers, or 5 miles across) is a small point of light in the ...

The sun's low angle near the terminator highlights the topography of craters within Rhea's wispy terrain. A similar view, Rhea in Natural Color, shows this region from a slightly different perspec...

This scene from Ceres, captured by NASA's Dawn spacecraft, shows an older crater (at top center) that has been blanketed by impact ejecta from the younger crater to its right.

This composite image shows a massive mountain range running just south of Titan's equator. Near the center of the image, the mountain range runs from southeast to northwest. It is about 150 kilomet...

This giant mosaic reveals Saturn's icy moon Rhea in her full, crater-scarred glory. This view consists of 21 clear-filter images and is centered at 0.4 degrees south latitude, 171 degrees west lon...

Cassini whizzed past Dione on Aug. 16, 2006, capturing this slightly motion-blurred view of the moon's fractured and broken landscape in reflected light from Saturn. The motion blur is a result of ...

Saturn's rings burst out of shadow and curve gracefully around the planet. Prometheus (86 kilometers, or 53 miles across at its widest point) appears as a bright speck touching the inside of the na...

Artist rendering of NASA's Dawn spacecraft approaching Mars.

Small water ice particles fly from fissures in the south polar region of Saturn's moon Enceladus in this image taken during the Aug. 13, 2010, flyby of the moon by NASA's Cassini spacecraft. This ...

Nereid, the last satellite of Neptune to be discovered before Voyager's recent discoveries, was first seen by Gerard Kuiper in 1949.

Io in Eclipse

This is an artists concept of Cassini during the Saturn Orbit Insertion (SOI) maneuver, just after the main engine has begun firing. The spacecraft is moving out of the plane of the page and to the...

Curving wakes perturb the edges of the Encke Gap in Saturn's A ring. The culprit in their creation is the flying saucer-shaped moon Pan, shining brightly within the gap. Ahead of Pan (26 kilometer...

Astronaut Edwin E. Aldrin Jr., lunar module pilot, walks on the surface of the moon near a leg of the Lunar Module during the Apollo 11 extravehicular activity (EVA).

This enhanced color map was produced by using images from the color base map imaging campaign during MESSENGER's primary mission.

This image from NASA's Dawn spacecraft of asteroid Vesta shows Aelia crater with a larger, more degraded crater to the left. Dark and bright material crops out from Aelia's rim and slumps towards i...

This image was taken on 2004-02-19 20:44 (PST) and received on Earth 2004-02-21 17:21 (PST).